Electric valve Action Force distance than ordinary valve larger, electric valve switch action speed can be adjusted, simple structure, easy maintenance, can be used to control air, water, steam, a variety of corrosive media, mud, oil, liquid metal and radioactive medium and other types of fluid flow. The traditional pneumatic valve action process due to the buffer characteristics of the gas itself, not easy to be damaged by the jammed, but must have gas source, and its control system is…